Re: Oil Temp sensor

["M Tipton" <miktip@worldnet.att.net>]

> From: Luis Marques <marques@ti.com>
> To: M Tipton 
> Subject: Re: Oil Temp sensor
> Date: Tuesday, May 20, 1997 07:47 AM
> 
> Ok, I found the oil temp. sender.  Actually, I had seen it before,
but
> never bothered to find out what it was.  Now, about the "thermo-time
> switch" on the back of the head, Phil Payne says it's the sender for
the
> water temp. gauge.  I seem to recall that this thermo time switch
was in
> the coolant jacket neck coming out of the head to the radiator,
Soooo,
> who's right?!

The item on the back of the head IS the thermo time switch! Part
Number
043 906 163A-2pin-35 degC-Brown, I have three heads in my shop, and 
4 thermo time switches!

What Phil is referring to may well be the "European version" 4kQ, or
4k, with 
the 4 cylinder engine!
The water temp sender is 049 919 501B-2 pin white.  I have three of
these in 
my shop!

Now all this IS relevant to a US Spec 4kq!  Which I have 2 in my
driveway!
and a third in the shop!  Two have been serviced and maintained by
myself for the past 10 years! 
> 
> About, the switch on the valve cover, if it was the after run
switch, it
> must be defective, because my car has _never_ turned on the radiator
fan
> with the ignition off!! (and I am in Texas).  In fact, I had to
hot-wire
> the switch in the radiator once it quit working and has remained
like
> that ever since.  Now my radiator is on whenever the ignition is on.

Bad move!  Not only will it never allow your engine to reach operating
temp, but
it will drain your battery, and burn out the rad fan much earlier than
the factory
intended.   On an aluminum blocked head, the radiator fan is not
something that should be taken "lightly" especially in Texas!
> 
> Luis
> 
> 
> M Tipton wrote:
> > 
> > The "oil temp sender" IS, IS located on the oil pump!  Affront the
> > engine at lower
> > front crank pulley, right hand side, has black wire...
> > 
> > The sensor coming out the back of the head is the "thermo-time
switch"
> > used by the
> > Fuel Injection to open the cold start injector!
> > 
> > The coolant temp sensor and sender are both located on the water
> > jacket neck coming out the side of the head, feeding into the
radiator
> > upper hose!
> > 
> > Changed everyone of these more than once!
> > 
> >                                       M